# Explain the importance of iron ions and phosphate ions to living organisms.

> AQA A-Level Biology (7402) — 3.1.8 Inorganic Ions · Explain · 5 marks

## Mark scheme (5 marks)

1. Iron ions are a component of haemoglobin
2. Haemoglobin carries / transports oxygen around the body
3. Phosphate ions are required for the synthesis / formation of ATP
4. Phosphate ions are a component of DNA / RNA / nucleotides
5. Phosphate ions are a component of phospholipids / cell membranes

## Key terms

- [iron ions](https://www.gradenine.co.uk/glossary/iron-ions)
- [phosphate ions](https://www.gradenine.co.uk/glossary/phosphate-ions)

## Related

- [Revision notes for AQA A-Level Biology (7402)](https://www.gradenine.co.uk/learn)
- [How to answer "Explain" questions](https://www.gradenine.co.uk/tools/command-word-cheatsheet)
- [Practice this with AI marking (free)](https://www.gradenine.co.uk/start)

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Source: [GradeNine](https://www.gradenine.co.uk/q/explain-the-importance-of-iron-ions-93aebe64) · Published by Druglandscape Ltd.